负载自适应扰动孤岛检测法
Load-adaptive Disturbance Islanding Detection Method
李莎 1鲍丹阳1
作者信息
- 1. 深圳职业技术大学,机电工程学院,广东 深圳 518055
- 折叠
摘要
以单相并网逆变器的孤岛检测为研究对象,分析了传统的主动频率偏移(AFD)法的主动移频扰动强度选取以及正反馈主动频率偏移(AFDPF)法中初始截断系数和正反馈系数的选取对电能质量的影响,以及这些方法所存在的检测盲区问题.提出了一种基于负载检测的自适应主动孤岛检测法,通过对并网逆变器的负载特性进行数字化检测识别,按不同负载施加不同扰动,进而优化扰动对电能质量产生的影响并能提高检测速度,避免检测盲区.基于Matlab环境对相关算法进行仿真研究,依据IEC 62116 搭建硬件环境进行相关算法实际台架测试,证明了本文所提方法的正确性和可行性.
Abstract
The research focuses on islanding detection of single-phase grid-connected inverters,analyzing the impact of active frequency shifting perturbation intensity selection in traditional active frequency drift(AFD)method and initial truncation coefficient and positive feedback coefficient selection in active frequency drift with positive feedback(AFDPF)method on power quality,as well as addressing the issue of detection blind spots.An adaptive active island-ing detection method based on load detection is proposed to digitally detect and identify the load characteristics of grid-connected inverters.Different disturbances are applied according to different loads to optimize their influence on power quality,improve detection speed,and avoid detection blind spots.Relevant algorithms are simulated in Matlab environment and actual bench tests are conducted according to IEC 62116 hardware environment to validate the cor-rectness and feasibility of the proposed method.
关键词
并网逆变器/孤岛检测/自适应/电能质量Key words
grid-connected inverter/islanding detection/adaptive/power quality引用本文复制引用
出版年
2025
NETL
NSTL
万方数据